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Posted to dev@pig.apache.org by "Koji Noguchi (JIRA)" <ji...@apache.org> on 2014/02/05 16:12:09 UTC
[jira] [Resolved] (PIG-3720) Nested concats of binary conditionals
take 1/2 hour to parse
[ https://issues.apache.org/jira/browse/PIG-3720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Koji Noguchi resolved PIG-3720.
-------------------------------
Resolution: Duplicate
I believe this is fixed in PIG-2769 for version 11.2 and later. Steve can you try patching it to your 0.10?
> Nested concats of binary conditionals take 1/2 hour to parse
> ------------------------------------------------------------
>
> Key: PIG-3720
> URL: https://issues.apache.org/jira/browse/PIG-3720
> Project: Pig
> Issue Type: Bug
> Components: parser
> Affects Versions: 0.10.0
> Reporter: Steve Ogden
> Priority: Minor
>
> This statement takes over 1/2 hour to parse. Seems to be related to the conditionals. Removing them and just running the nested concats, it parses fast:
> fact_tsgsrtd_dim_hash = foreach tsgsrtd generate checksum,
> UPPER(
> CONCAT((no_of_rics == '\\N' ? '0' : no_of_rics),
> CONCAT(request_start_dttm,
> CONCAT(request_end_dttm,
> CONCAT((adjs_list == '\\N' ? 'UNKNOWN' : adjs_list),
> CONCAT((event_datatype == '\\N' ? 'UNKNOWN' : event_datatype),
> CONCAT((facts_list == '\\N' ? 'UNKNOWN' : facts_list),
> CONCAT((frequency == '\\N' ? 'UNKNOWN' : frequency),
> CONCAT((points == '\\N' ? '0' : points),
> CONCAT((multiplier == '\\N' ? '0' : multiplier),
> CONCAT((qos == '\\N' ? 'UNKNOWN' : qos),
> CONCAT((pe == '\\N' ? '0' : pe),
> (event_type == 'GSREQ' ? 'GS' : (event_type == 'RICREQ' ? 'RTD' : (event_type == 'TSREQ' ? 'TS' : 'UNKNOWN')))
> ))))))))))));
> I noticed it I split it, do half the conditionals in one relation, then take the results of that and create another relation and do the other half of the conditionals, it parses in less than a minute:
> fact_tsgsrtd_cat1 = foreach tsgsrtd generate checksum, points, multiplier, qos, pe, event_type,
> CONCAT(CONCAT((no_of_rics == '\\N' ? '0' : no_of_rics),'.000000000'),
> CONCAT(request_start_dttm,
> CONCAT(request_end_dttm,
> CONCAT((adjs_list == '\\N' ? 'UNKNOWN' : adjs_list),
> CONCAT((event_datatype == '\\N' ? 'UNKNOWN' : event_datatype),
> CONCAT((facts_list == '\\N' ? 'UNKNOWN' : facts_list),
> (frequency == '\\N' ? 'UNKNOWN' : frequency)
> )))))) as cat1;
> fact_tsgsrtd_dim_hash = foreach fact_tsgsrtd_cat1 generate checksum,
> UPPER(
> CONCAT(cat1,
> CONCAT((points == '\\N' ? '0' : points),
> CONCAT((multiplier == '\\N' ? '0' : multiplier),
> CONCAT((qos == '\\N' ? 'UNKNOWN' : qos),
> CONCAT(CONCAT((pe == '\\N' ? '0' : pe), '.0000'),
> (event_type == 'GSREQ' ? 'GS' : (event_type == 'RICREQ' ? 'RTD' : (event_type == 'TSREQ' ? 'TS' : 'UNKNOWN')))
> )))))) as ts_dim_hash;
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